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Technics SL-1900 (M)

Technics SL-1900 (M)
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Technics SL-1900 (M) Specifications

General IconGeneral
Drive methodDirect drive
Speeds33 1/3 and 45 rpm
Wow and flutter0.03% WRMS
Signal-to-noise ratio70 dB
Effective length230 mm
Overhang15 mm
Stylus pressure adjustment range0-3g
MotorDC motor
Turntable platterAluminum die-cast
Rumble-70 dB (DIN-B)
Offset angle22 degrees
Power RequirementsAC 120V, 60Hz

Summary

Specifications

Turntable section

Details on drive method, motor, platter, speeds, and pitch control.

Tonearm section

Specifications for tonearm type, effective length, and friction.

PARTS IDENTIFICATIONS

ADJUSTMENT - 1

Horizontal Balance and Stylus Pressure Adjustment

Procedures for setting the tonearm's horizontal balance and stylus pressure.

ADJUSTMENT - 2

Arm Lift Height and Automatic Function Adjustments

Adjusting arm lift height and automatic start/return positions.

Operation principles of the SL-1900

Speed adjustment

How to adjust turntable speed using strobe dots and pitch controls.

Operating principle

Explanation of the B.F.G. method and electronic control system.

Explanation of each part

B.F.G. Method Explanation

How back EMF is used for frequency generation and speed control.

Frequency-Voltage Conversion Circuit

Circuit converting B.F.G. frequency to voltage for speed regulation.

Schematic Diagram

Circuit Board Wiring View

EXPLODED VIEW OF TURNTABLE

Exploded View of Turntable Components

REPLACEMENT PARTS LIST

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